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Abstract #2737

High Resolution DWI with Readout-segmented EPI and computed DWI as a potential alternative of High Resolution Dynamic Contrast Enhanced MRI in evaluating Breast Cancer

MASAKO Y KATAOKA1, Shotaro Kanao1, Mami Iima1, Natsuko Onishi1, Makiko Kawai1, Akane Ohashi1, Rena Sakaguchi1, Masakazu Toi2, and Kaori Togashi1

1Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan, 2Breast Surgery, Kyoto University, Kyoto, Japan

Eighteen breast lesions underwent high resolution (HR) diffusion-weighted MRI (DWI) with a resolution of 1.1 x 1.1 x 1.4 mm and b value of 0 and 850 sec/mm2 using readout-segmented echo-planar imaging (rs-EPI). Computed (c) DWI with b value of 1200 sec/mm2 were calculated. Lesion conspicuity and maximum size on these images were compared to those on HR DCE MRI. Masses showed relatively good lesion conspicuity on rs-EPI, slightly deteriorated on cDWI. Size was similar between rs-EPI and HR-DCE, while slightly smaller for cDWI. In contrast, NME is often poorly visualized on rs-EPI and cDWI, resulting in underestimation of NME.

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